Earth rock cofferdam structure

Abstract

The utility model relates to the technical field of earth rock cofferdam structures, and discloses an earth rock cofferdam structure which comprises a clay embankment with slopes on the two sides, a broken stone hardcore is fixedly laid on the top of the clay embankment, a mud stone layer is fixedly laid on the upper end face of the broken stone hardcore, and the mud stone layer is fixedly laid on the lower end face of the broken stone hardcore. A second anti-seepage geomembrane is laid on the upstream face of the clay embankment, a bagged loess pressing layer is laid on the second anti-seepage geomembrane in a pressing mode, and bagged gravel is arranged at the root of the clay embankment in a thick pile mode and used for preventing water and soil loss of the bagged loess pressing layer. And a first anti-seepage geomembrane is paved between the bagged gravel and the bagged loess pressing layer. According to the utility model, the geomembrane is used as the impermeable layer, and the geomembrane is low in cost and can be purchased everywhere. And the construction efficiency of the geomembrane is high, the anti-seepage effect is better, water and soil impact and loss are effectively reduced through the bagged soil / stone pressing layer, and the stability of the cofferdam structure is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of earth-rock cofferdam structures, in particular to an earth-rock cofferdam structure. Background Art

[0002] In the construction process of hydraulic engineering, the rising water level of rivers affects the state of the construction site, which in turn affects the construction of hydraulic engineering. The cost of setting up a temporary earth-rock cofferdam is low and can well solve the problem of the site being flooded by river water. In temporary earth cofferdams, the anti-seepage problem has always been the key to construction technology. The conventional anti-seepage solution is to set up interlayer clay. However, clay materials with good anti-seepage effect are restricted by regions, and the cost of purchasing them from other places is high. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in order to overcome the above problems, an earth-rock cofferdam structure is provided, which solves the above problems.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] A soil-rock cofferdam structure comprises a clay embankment with slopes on both sides, a crushed stone cushion layer is flatly fixed on the top of the clay embankment, a mud-stone layer is flatly fixed on the upper end surface of the crushed stone cushion layer, a second impermeable geomembrane is paved on the water-facing surface of the clay embankment, and a bagged loess pressure layer is paved on the second impermeable geomembrane, bagged crushed stones are thickly piled at the root of the clay embankment to prevent soil and water loss of the bagged loess pressure layer, a first impermeable geomembrane is paved between the bagged crushed stones and the bagged loess pressure layer, and the back-water slope of the structure is greater than the water-facing slope, in addition, a steel pipe purlin is fixed on the front side of the bagged crushed stones by a pile driver, and steel sheet piles are fixedly connected to the inner wall of the steel pipe purlin by steel wire rope knots, which effectively improves the impact resistance of the bagged crushed stones.

[0006] Furthermore, in order to improve the structural strength and stability of the steel tube purlin, bagged clay is filled in the steel tube purlin.

[0007] Furthermore, the height of the steel pipe purlin is greater than the height of the bagged gravel, and the width thereof is not less than the width of the upper table surface of the bagged gravel.

[0008] The advantages and positive effects of the utility model are: the earth-rock cofferdam structure adopts geomembrane as the anti-seepage layer, the cost of geomembrane is low, and it can be purchased everywhere. In addition, the construction efficiency of geomembrane is high, the anti-seepage effect is better, and the bagged soil / rock pressure layer effectively reduces the impact and loss of water and soil, ensuring the stability of the cofferdam structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] 10. Steel pipe purlin; 11. Mud-stone layer; 12. Gravel cushion layer; 13. Clay embankment; 14. Bag loess pressure layer; 15. Second anti-seepage geomembrane; 16. Bag gravel; 17. First anti-seepage geomembrane; 18. Bag clay; 19. Steel sheet piles. DETAILED DESCRIPTION

[0012] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0013] The following is a further description of the embodiments of the present invention in conjunction with the accompanying drawings:

[0014] like Figure 1 As shown, the earth-rock cofferdam structure described in the utility model comprises a clay embankment 13 with slopes on both sides, a crushed stone cushion layer 12 is flatly fixed on the top of the clay embankment 13, a mud stone layer 11 is flatly fixed on the upper end surface of the crushed stone cushion layer 12, and a second impermeable geomembrane 15 is paved on the water-facing surface of the clay embankment 13, and a bagged loess pressure layer 14 is laid on the second impermeable geomembrane 15, bagged gravel 16 is thickly piled at the root of the clay embankment 13 to prevent soil and water loss of the bagged loess pressure layer 14, and a first impermeable geomembrane 17 is laid between the bagged gravel 16 and the bagged loess pressure layer 14.

[0015] Preferably, the slope of the back-water surface of the structure is greater than the slope of the front-water surface.

[0016] Preferably, a steel pipe purlin 10 is fixedly provided on the front side of the bagged gravel 16 by a pile driver, and a steel sheet pile 19 is fixedly connected to the inner wall of the steel pipe purlin 10 by a steel wire knot, which effectively improves the impact resistance of the bagged gravel 16.

[0017] Preferably, in order to improve the structural strength and stability of the steel tube purlin 10 , bagged clay 18 is filled in the steel tube purlin 10 .

[0018] Preferably, the height of the steel tube purlin 10 is greater than the height of the bagged gravel 16 , and the width thereof is not less than the width of the upper surface of the bagged gravel 16 .

[0019] It should be emphasized that the embodiments described in the present invention are illustrative rather than restrictive. Therefore, the present invention is not limited to the embodiments described in the specific implementation manner. Any other implementation manners derived by those skilled in the art based on the technical solution of the present invention also fall within the scope of protection of the present invention.

Claims

1. An earth-rock cofferdam structure, comprising a clay embankment (13) with slopes on both sides, characterized in that: A crushed stone cushion layer (12) is laid flat and fixed on the top of the clay embankment (13), a mud stone layer (11) is laid flat and fixed on the upper end surface of the crushed stone cushion layer (12), a second impermeable geomembrane (15) is laid on the water-facing surface of the clay embankment (13), and a bagged loess pressure layer (14) is laid on the second impermeable geomembrane (15), bagged crushed stones (16) are thickly piled at the root of the clay embankment (13) to prevent soil and water loss of the bagged loess pressure layer (14), and a first impermeable geomembrane (17) is laid between the bagged crushed stones (16) and the bagged loess pressure layer (14).

2. The earth-rock cofferdam structure according to claim 1, characterized in that: The slope of the back water surface of the structure is greater than the slope of the front water surface.

3. The earth-rock cofferdam structure according to claim 2, characterized in that: A steel pipe purlin (10) is fixedly provided on the front side of the bagged gravel (16) by a pile driver, and a steel sheet pile (19) is fixedly connected to the inner wall of the steel pipe purlin (10) by a steel wire rope knot, thereby effectively improving the impact resistance of the bagged gravel (16).

4. The earth-rock cofferdam structure according to claim 3, characterized in that: In order to improve the structural strength and stability of the steel tube purlin (10), bagged clay (18) is filled in the steel tube purlin (10).

5. The earth-rock cofferdam structure according to claim 4, characterized in that: The height of the steel pipe purlin (10) is greater than the height of the bagged gravel (16), and its width is not less than the width of the upper surface of the bagged gravel (16).

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